Does anybody know how to utilize PGP with a volume of files?
TrueCrypt and Cryptomator create an encrypted volume of files which can be edited then the volume is closed and everything is encrypted again. Is there a PGP implementation of the same concept? Is there a way of doing this with Kleopatra I am not aware of?
While you can use PGP to do this, it is generally not recommended in favor of dedicated tools.
PG recommends Cryptomator and PicoCrypt: Recommended Encryption Software: VeraCrypt, Cryptomator, PicoCrypt, and OpenPGP - Privacy Guides
I personally recommend gocryptfs or cryfs via the sirikali GUI, but neither of those work on Windows.
VeraCrypt should also be used in favor of TrueCrypt.
You can also create LUKS or BitLocker enabled disk images that you can mount without third party software.
That’s awesome. How would one do this?
Nope not really. PGP is about encrypting emails, not about disk encryption or encrypted containers. You can run a batch job of encrypting/decrypting a bunch of files with PGP to access them, or you can create a filesystem inside a container file. But neither does on-the-fly encryption you will want. This will also mean you will decrypt the content of the entire volume and write it into a plaintext file, before you mount your files. This is ridiculously slow, and very insecure given that wear leveling of modern SSDs prevents you from securely erasing the files once you’ve written them in decrypted file, your data confidentiality is not that safe from threats that might be coming after your disk.
Today, you’ll want VeraCrypt over TrueCrypt for external drives. For Linux operating disks, the LUKS disk encryption you configure during installation (note: different than merely encrypting the /home/ dir which is a separate setting) is fine.